6746778736 has 40 divisors (see below), whose sum is σ = 13339838160. Its totient is φ = 3304444416.

The previous prime is 6746778721. The next prime is 6746778743. The reversal of 6746778736 is 6378776476.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552796 + ... + 564868.

It is an arithmetic number, because the mean of its divisors is an integer number (333495954).

Almost surely, 2^6746778736 is an apocalyptic number.

It is an amenable number.

6746778736 is a deficient number, since it is larger than the sum of its proper divisors (6593059424).

6746778736 is a wasteful number, since it uses less digits than its factorization.

6746778736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12793 (or 12787 counting only the distinct ones).

The product of its digits is 49787136, while the sum is 61.

The square root of 6746778736 is about 82138.7772979364. Note that the first 3 decimals coincide. The cubic root of 6746778736 is about 1889.5808945384.

The spelling of 6746778736 in words is "six billion, seven hundred forty-six million, seven hundred seventy-eight thousand, seven hundred thirty-six".